ToolVet
75trust / 100

Guard

by sentinel-agent.dev in Other

x402 APIPassing, checked 2 h ago

SENTINEL pre-execution safety verdict

POST
https://sentinel-agent.dev/v1/guard
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
302 ms
793 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

POST https://sentinel-agent.dev/v1/guard

Each call costs $0.005 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

The listing has no example input.

POST https://sentinel-agent.dev/v1/guard
content-type: application/json

{}

Example response

The provider's example. We can't check it without paying.

{
  "risks": [],
  "signature": "base64...",
  "verdict": "SAFE"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://sentinel-agent.dev/v1/guard' \
  -H 'content-type: application/json' \
  --data-raw '{}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://sentinel-agent.dev/v1/guard' \
  -H 'content-type: application/json' \
  --data-raw '{}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsentinel-agent.dev%2Fv1%2Fguard&method=POST
const res = await pay("https://sentinel-agent.dev/v1/guard", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({}),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://sentinel-agent.dev/v1/guard",
        json={},
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402293 ms$0.005
6 h agoPassed402756 ms$0.005
10 h agoPassed402675 ms$0.005
14 h agoPassed402851 ms$0.005
18 h agoPassed402645 ms$0.005
Show 10 older checks
22 h agoPassed402793 ms$0.005
26 h agoPassed402299 ms$0.005
30 h agoPassed402299 ms$0.005
34 h agoPassed402233 ms$0.005
37 h agoPassed402273 ms$0.005
40 h agoPassed402297 ms$0.005
44 h agoPassed402302 ms$0.005
47 h agoPassed402714 ms$0.005
2 days agoPassed402457 ms$0.005
2 days agoPassed402261 ms$0.005